code: def test_infer_schema_null_geometry_and_2D_point():
      df = GeoDataFrame(geometry=[None, city_hall_entrance])
  
      # None geometry type is then omitted
      assert infer_schema(df) == {
          "geometry": "Point",
          "properties": OrderedDict(),
      }
  
imports: from collections import OrderedDict
  from shapely.geometry import LineString, MultiLineString, MultiPoint, MultiPolygon, Point, Polygon
  import pandas
  import pytest
  import numpy
  from geopandas import GeoDataFrame
  from geopandas.io.file import infer_schema
label_desc: Use image node_id 18 for calling a global function with example usage: test_infer_schema_null_geometry_and_2D_point() without return types